Snag free Design. No sharp edges prevent tangling of the rifle with the shooter’s sling or molle gear. Modular VBOST (Vehicle Borne Operations Sling Tab) This tab interfaces with the shooter’s riggers’ band or bungee to secure the shooter’s sling against the stock when the carbine is not in use. Two different types of ambidextrous sling mounting options, including QD swivel sockets. Simple modular design. 5 parts, and 1 screw allow for modular adaption of future stock options and configurations. This stock kits includes BCM 7075T6 Mil-Spec receiver extension, a locking nut M4, a Mil-Spec carbine action spring, a carbine buffer and a BCM QD swivel mount end plate.